-8m²-8m-8<0
    100x<900
    2/(x+1)>1
    (108*1.2+4)*11.25*1.15*1.15x/100>(120*1.2+4)*11.25*1.15x/100
    (103*1.2+4)*11.25*1.15*1.15*x/100>(120*1.2+4)*11.25*1.15*x/100
    (103*1.2+4)*11.25*1.15*1.15*x/100>(108*1.2+4)*11.25*1.15*x/100
    133*11.25*1.15*1.15*x/100>148*11.25*1.15*x/100
    (x-3)(3x+4)>0
    3x>-4
    3x<-4
    log(1/3,4x^2-3x+1)>=0
    x+3-4/x＞0
    4x^2-3x+1>0
    5x+5<15
    4x-1>13
    3x+2>7
    2x+4≤14
    9x+5<19
    8x+2≥18
    7x+3>8

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